Select random keyframe in dope sheet

Possibility to select random in dope sheet.

I'm sorry if i don't write a huge topic, but i don't think i need to do that for this simple thing.

Example : in this dope sheet there is a lot of objet, so if i would like have a result like that : youtube.com/watch it will take me time to use the random selction on object, and then in dope sheet, instead of doing all it directly in dope sheet.